Study Guide #2 force
A 2 N and an 8 N force pull on an object to the right and a 4 N force pulls on the same object to the left. If the object has a mass of 0.5 kg, what would be its acceleration?
12 m/s^2
A 500 N force is applied to a 25 m/s² object. The mass of the object is __________.
20 kg
Calculate the mass. of an object that is accelerating 14 m/s² with a force of 280 N.
280 N
Calculate the force on an object that has a mass of 10 kg and an acceleration of 4 m/s².
40 N
What is the force being applied to an object with a mass of 12 kg and an acceleration of 4 m/s²?
48 N
A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?
800 N up
According to Newton's laws, for any object, the greater the force that's applied to it, the greater its __________ will be.
acceleration
An object that is falling freely has a constant __________.
acceleration
A friction-like force that opposes the motion of objects that move through the air.
air resistance
The upward force on an object falling through the air is _________.
air resistance
When two forces on the same object are equal and opposite, the forces are called _________ forces.
balanced
A group of students is playing tug-of-war. The students on both sides of the rope are pulling with equal force so that the rope is not moving. This is an example of:
balanced forces
Push or pull one body exerts on another.
force
The attraction any two objects have on one another.
gravity
As the mass of an object increases, its inertia will __________.
increase
The tendency of an object to resist changes in motion.
inertia
The __________ of an object does not change, but its __________ can, based on its location.
mass, weight
The size of the gravitational force between two objects depends on their __________.
masses and the distance between them
Related to the amount of force needed to change an object's motion.
momentum
An object in motion will move at a constant velocity unless an unbalanced force acts upon it.
newton's 1st law
The relationship among mass, force, and acceleration is explained by __________.
newton's 2nd Law of Motion
A net force acting on an object causes the object to accelerate in the direction of the net force.
newton's 2nd law
"To every actions there is an equal and opposite reaction" describes which law?
newton's 3rd law of motion
The highest velocity a falling object
terminal velocity
A firefighter feels the hose pushing backwards onto him as he uses it to put out a fire. What is the most likely cause of this?
the escaping water exerts an equal and opposite force on the hose.
A student drops a feather and rock at the same time from Mrs. Taylor's window. If air resistance wasn't a factor, what should she observe?
the rock and the feather fall at the same rate.
Which of the following best describes how a swimmer moves through the water?
the swimmer pushes backwards on the water and the water pushes with an equal but opposite force back on the swimmer
The force of gravity on an object.
weight
What is measured in newtons?
weight
